Welcome to the Community. Yes you can upgrade to 8 GB on this computer. The memory type for this computer is 1066 MHz DDR3. You will need 2 sticks of 2 GB. Use the below link for help on how to replace your memory.
<ADMIN NOTE: Broken link has been removed from this post by Dell>
Hope this helps.
thnks Royan, you really helped me , i was practisng for Cisco exams , and i really need more memory, what i am going to do is keeping a stick of 2 gb in one slot a nd 4 gb in next slot. so makes total 6 gb,i heard that the operating system should be 64bit to suport full memory, Do you own inspiron 1564 , whic operting systemn you are using 32 or 64 bit.i am using Ubuntu 32 bit.How much is your lap top Ram
6 GB should work on your computer, and does not mean that you need to have a 64bit operating system to make full use of the memory. Its always recommended that you have 2 memory sticks of the same size for optimum performance from the memory, having said that adding 6 GB will not make alot of difference and should be able to work.
" Its always recommended that you have 2 memory sticks of the same size for optimum performance from the memory, having said that adding 6 GB will not make alot of difference and should be able to work." Oho ..so 2 gb on one slot and 4 gb on another slot wont increase perfomance.It better 4 gb on slot and 4 gb on another slot is it ? thtss new knwledge for me and helpfull too...